noun
roentgenium
rent-GEN-ee-um
Roentgenium (noun) means a chemical element with the symbol Rg and atomic number 111, heavier than uranium. Example: “Roentgenium sits at number 111 in the periodic table.”
noun
1
chemistry A chemical element with the symbol Rg and atomic number 111, heavier than uranium.
"Roentgenium sits at number 111 in the periodic table."
"The symbol for roentgenium is Rg."
"Roentgenium is a transuranic element."
How to use roentgenium
Learner’s notesIn plain EnglishThe chemical element with atomic number 111, symbol Rg.
When to use it
It is a technical term used in chemistry and physics.
Memory tip
The symbol is Rg, and the name is normally written without a capital letter, like other element names.
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Common pairings
the element roentgenium
roentgenium atoms
atomic number of roentgenium
a transuranic element
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Fill the gap
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_____ sits at number 111 in the periodic table.
Etymology
The name is formed from Roentgen plus the suffix -ium, used for chemical elements. It honours Wilhelm Roentgen.
Rhymes for roentgenium
See all rhymes for roentgenium →Frequently asked questions
What is roentgenium?
Roentgenium is a transuranic chemical element with the symbol Rg and atomic number 111.
Who is roentgenium named after?
It is named after Wilhelm Roentgen.
What was roentgenium called before it was named?
It was known as unununium before it was officially named, and as eka-gold before it was discovered.
What is the meaning of roentgenium?
"roentgenium" (noun) means a chemical element with the symbol Rg and atomic number 111, heavier than uranium.
